/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.editor;

import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.visitor.LocalVariableTypeInfoVisitor;

/**
 * This LocalVariableTypeInfoVisitor adds all local variable types that it visits to the given target local variable
 * type attribute.
 */
public class LocalVariableTypeInfoAdder implements LocalVariableTypeInfoVisitor {
    private final ConstantAdder constantAdder;
    private final LocalVariableTypeTableAttributeEditor localVariableTypeTableAttributeEditor;

    /**
     * Creates a new LocalVariableTypeInfoAdder that will copy local variable types into the given target local variable
     * type table.
     */
    public LocalVariableTypeInfoAdder(ProgramClass targetClass,
        LocalVariableTypeTableAttribute targetLocalVariableTypeTableAttribute) {
        this.constantAdder = new ConstantAdder(targetClass);
        this.localVariableTypeTableAttributeEditor =
            new LocalVariableTypeTableAttributeEditor(targetLocalVariableTypeTableAttribute);
    }

    // Implementations for LocalVariableTypeInfoVisitor.

    public void visitLocalVariableTypeInfo(Clazz clazz, Method method, CodeAttribute codeAttribute,
        LocalVariableTypeInfo localVariableTypeInfo) {
        // Create a new local variable type.
        LocalVariableTypeInfo newLocalVariableTypeInfo = new LocalVariableTypeInfo(localVariableTypeInfo.u2startPC,
            localVariableTypeInfo.u2length, constantAdder.addConstant(clazz, localVariableTypeInfo.u2nameIndex),
            constantAdder.addConstant(clazz, localVariableTypeInfo.u2signatureIndex), localVariableTypeInfo.u2index);

        // TODO: Clone array.
        newLocalVariableTypeInfo.referencedClasses = localVariableTypeInfo.referencedClasses;

        // Add it to the target.
        localVariableTypeTableAttributeEditor.addLocalVariableTypeInfo(newLocalVariableTypeInfo);
    }
}